Sewing-machine.



M. DRGKERMAN.

SEWING MACHINE.

APPLICATLON FILED Amma, 1912.

Patented Jan. 2l, 1913.

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snvvrNo-iaeonmn.

Specification of Letters atent.

Patented lan. 2i., Mll.

.implication tiled .liprl a, 1912. Serial No. 689,229.

To all wilco?, it' may concern Be it lrnovvn that l, MAX Dnocirnmmn, a citizen of the United States, and a resident of Brooklyn, in the county ot Kings and State or" il'evv York, have invented certain non7 and usei'nl lmprovements in Sewingll/lacliineo, of which the. following is a specilic/ation., taken in connection With. the accompartying drawii'ig, which 'forms a part of the SUIS.

My invention relates to sewing machines and more particularly to a Sewing machine adapted to malte a circular seam.

My invention further relates to an attachmenti ttor a serving; mchine having a vertically and laterally reciprocating needle adapted to maire a zigzag stitch so as to adapt that form et sewing machine, which is old, to make a circular seam. rlhese circular aceras may loe need for various purposee but are principally used in embroidery, the seein. either having@r an open or a closed center as may suit the particular article being embroidered, the circular seams being either the sole or principal feature of the embroidery, or they may form portions of a more or less elaborate embroidery design.

ln the accompanying drawing showing' an illustrative embodiment of my invention and in which the same reference numerals refer to similar parte in `the several figures, Figure l. is a side elevation oit a-portion ot a Serving machine showing my invention; Fig'. 2 a horizontal section on the line 2-2 Fig. l looking' in the direction of the arrows, 'a portion of the mechanism being broken avvay tor the purpose oli' clearer illustration; Fig. 3 is a perspective view oft my improved throat plate; Fig. t is a per apective View oit a modified form of' throat plate; Fig', 5 is 'a plan view of a piece of embroidery provided with my circular seam; Fig. 6 ia a plan view of another piece of embroidery provided With a slightly dii"- ferent `torno of circular scam; Fig. 7 is a plan view of a fabric provided With a aigaag stitch made by the ordinary machine provided with a vertically and laterally re ciprocating needle; and Fig. 8 is a plan view of the reverse of the fabric illustrated in Fig. 5, showing more or less diagrammatically the form of stitch or loop made by the needle thread and the locking or shuttle thread.

In the illustrative embodiment-s ofmy invention shown in the drawing, l is the head of the sewing' machine provided with the ordinary needle bar Q. tension device 3 and take up lever 4 ot' any approved construct-ion in Which the needle reciprocates both vertically and laterally. The bed 5 of the sewing machine is provided with. my improved throat plate 6, Figs. 2 and 3. This throat plate is provided With the ordinary feed dog slot l to receive the ordinary feed dog 8 and -with the ordinary needle slot 9 fora verA tically and laterally reciprocating needle.

. This throat plate is further provided with some form of pivoting means, for example the pin 10, for a purpose which will `be hereinafter described. The pin l() is pret'-` erably though not necessarily provided with a groove 28 to cooperate with the vertically and laterally reciprocating needle. .The sewing machine is further provided with the ordinary presser foot 11 to coperatewith the it'eed dog 8. ln addition tothe presser foot l1 l preferably usca second presser foot l2 which is preferably provided With a cut out portion 13 to receive the pin 10.

A pieoepof fabric -or other material le ie'` provided vvith an opening or hole 15, Fig. 5, which *would preferably be cfa diameter to snugly fit the pin 10. The .fabilv or other material is then placed between the presser feet ll, 12 and the throat plate 6, the opening l5 being brought into engagement with the pin l0. Upon releasing the presser feet Y and permitting them tcl-bear upon'the goods in the ordinai'yway and upon starting the machine, the feed dog" S will cause` the fabric o1' material 14 to be fed in a circular path beneath the needle and around the vpin 10 which is the center of the circle described by the lfabric as it is fed automatically-by the feed lop 8. y The threads of the machine, as the needle reeiprocates laterally and vertically, will form a circular' seein i6, Fig, 5, the Athreads radiating froln the center 15 as radii of a shuttle or locking thread. cinch machines circle. I have shown such a seam diagraminatically in Fig. 5 and have omitted many of the threads of the preferred construction so as to more clearly show the seam formed by the sewing machine. The thread Q6 is the needle thread, while the locking or shuttle thread, appearing on the back or reverse f the fabric, is shown at 2T, Fig. 8.

In some cases, of course, it may 'be desiri present invention. My attachment, where-l ble t0 fOl'm the 593m 0f COmPlIalVely feW by I convertsuch a machine adapted are in all respects simiiar to that previousfj described with the exception that they einploy a throat plate with two feed dog slots and a double fcc-.l dog to operate in both the feed dog slots, two presser feet. such as 11 bt ing employed, one for each feed dog. Such a form of sewing machine is oldv and weil known in the.art and forms no part of my radial stitches Q6 such for example as shown marily to malte the zigzag embroinnry in'Fig. 5. Preferably, however, additional radial stitches 26 are used from that shown in Fig. so as to substantially cover up the intervals or gaps between the radial `stitches shown in that Vfigure, these additional stitches notebeing shownin the figure as they/'would simply tend to confuse the illustration, as they would have to be illustrated by a substantially black ring. These radial stitches also preferably protect the raw edge of the opening in the fabric making a finished and artistic circular gure or seam. y v

In some cases where it is not desirable to cut or form a permanent opening in the fabric, I use 4an interchangeable throat plate 17, Fig. 1, having a feed dog slot 18', the usual needle slot 1.9 for a vertically and laterally movable needle and in thisrl form provide the throat plate with a sharp pointed needle or pin 2O which is adapted to separate the threads. strands or other portion ofthe material operated upon so as? to form a pivoting point around which the material or fabric can move while being embroidered with such a circular seam.

In Fig. 6 I have shown a fabric 2l provided with a circular seam :22 formed with the aid of such a throat plate as illustrated in Fig. i, there being no permanent opening seams or figures which I have here dis--` closed. VThese circular seams are described more fully and claimed in my companion same time as this application.

stitch shown in Fig. 7 to malte the circular embroidery seams Figs. 5 and G, consists cssentially of the throatv plate (3 or 17 and such as 12. l H

To change the old form of machine/so that it will malte muv improved circftiliar seam, it is merely necessary to remove Athe removable throat plate of the old machine, and replace the double feed dogs with a single feed dog such as 8, or if two separate feed dogs are used, simply to disconnect one of the'm leaving the other one, such for ef:- ample as 8,-to coperate with the feed dog slot T or 18 as the case may be. I also preferably remove one of the rpresser feet l1 and substitute for it the presser foot 12.50 that it will kee the goods or material from working otpof the pivoting means l() or Q0 as the. case may be, depending upon the particular form of throat piece employed.

It will be seen, therefore, that by my attachment the ends Q5, Fig. Y, for example of the stitches, will be crowded or gathered about a common center which will be the center of the pivoting means 10 or 20 while the ends 24 of the stitches will radiate from the center of the circle, the threads Q6 con-` necting the two Vends @et and 25 extending out as radii of the circular seam in both the constructions.

Having thus described this invention in connection with illustrative embodiments thereof to the details of which I do not desire to be limited, what is claimed as new and what it is desired to secure by Letters Patent is set forth in the appended claims.

I claim: f

l. In a sewing machine provided with means for vertically and laterally recipro.

eating a needle, thc f-on'ibinatqion of a feed i v dog, and a presser foot cooperating with the applicatxon'er. No. 689,230 filed at the invention may include simply a machine.

Fig. 'i' by theaid of a needle thread and a feed dog, a pivot member to retard the travel of th goods actuated by the feed dog and cause it to move beneath the needle in a circle and a second presser foot to coperat'e with the pivot member.

In a sewing machine provided with lil 0 means'for vertically and laterally reciproeating a needle. the combination of a feed dff and a presser foot cooperating with it, a throat plate provided with pivoting means whew emi' e second Vpressez" foot coperating vwith havin a groove to receive the needle, and a the pivoting means. v secon presser foot ceperating with the In a sewing machine providedl with pin.

Ineens for vertically and laterally reci ro- MAX DRUCKERMAN.

5 eating n medie, the combinwtion of al eed Witnesses:

do mld e presser foot co ereting with it, ALAN M. Jou-Nemi. e ti plate provided wit e pivoting pin Home Mmm; 

